Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3cea8199057275ca2c9fe29b3a6b06444a209b933e999d4481977ea33c3f2a2a' 
  AND token = 'IEUbh7ybyEklAohF71Vj6pZtAV/CaaKRKNyxuFF4WEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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