Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e90f8ee0c3c61e59488492fba33359df7b8d33d17fb5e402e0a421a92f9b02a7' 
  AND token = 'EKVCngAra5SaMDOEVsTF7HBAOzRO8ZcZZ2OJwvKHqv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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