Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bdd4fcf23c0e483d53aec4eb6378f57bbd18604a70a316091b4587d1381c730' 
  AND token = '/KQshervvTPnMP7tJD2TU6q6+NFJJrVJ0RSFURpnbI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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