Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7914a26ee22c2e121c83c99b334063d2ab13b54b238377204b5722d87423fd9' 
  AND token = 'drYIEz5cGcHDOXX091uKZl2u3rugFT1ih164ze9yiXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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