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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b205a2f65926d7291e4d5a61af3a78aef29dcd531d9ea3ba807b5e7a6078d61' 
  AND token = 's5Iwkq2yl3vCCP5PLKWb6Io2nQoVIy4TrLi5er9Tc84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}