Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0b3e780f06eae860b6d5a41b1867b697a412b13af318b4a25e409314fe2f9a9' 
  AND token = 'E8JfwnpTZnSUv0KaFMXlSDC3vnVzwDGYW76QGdn21ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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