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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'deae9da44b9b02ee02c86703a0231f07ff5da5ac60292e76eac22b1527d0ed8d' 
  AND token = 'X1yg0r+uWRIYu8pLSAZU2n5x6tS8PnZ9j72sGuXLm8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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