Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c249abcd24b6e5c7975acabce4f7e700567349d4348f19055f4c6e9e26cb703e' 
  AND token = 'fjs/YpPIuF5E+8ehetbjFU3iKn/k4fJuOpWvzghcvt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}