Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4434dde582c90e49990b496138bce1f0625d0d15d7928170531f93244143d91' 
  AND token = '3jNvL6hXSBDF2YnEygjuvHXRvems/BerOYW0FPRNi2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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