Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31aab5d5ca991f523c3759bd7a66d97d14880497a454fa841b495472c07e5bb4' 
  AND token = '718F+rTGm5l0uEA/dUr95vTwerclUE44llYcjR4vKWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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