Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '525479c6c8e0e92406eb7566606adc47e5cb44e89105a9a9267efca2248ad2ac' 
  AND token = 'FMpmC1ajf8R4YQfyqwWUU8DIe57XTZxlYA7L4xliJ7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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