SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9053b48fd0abffbb2ec3af26b418adcee79e97645449e81ca82d5efe17bcd103' 
  AND token = 'rLzp+DUtN9iMGwPH+luJ8UIVY+JoBupOuKTCFKqkvPk=' 
  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"
    }
  }
}