Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd67693d2d535ba1bcaba321b7e4073fe1d3f73fa6f9d6443be527ed6f2c6db0a' 
  AND token = 'dIXhKcJnT8OMNLD81IsGcQD/M9T51nmh+qnafWST8oY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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