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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01fa59fef2b21d4f2907fff9dea4b0b06fb846208ad03388936803577261894b' 
  AND token = 'w3xBaL9gESHSlS+Dngd03PPuXUq34rGwbQ6OpcGfhlI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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