Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bea3d0d3065c073423d663b842b0ae34e7047558e6b7e2ea431df96a72ee767f' 
  AND token = 'OCMEqYLjbhgRqFhw6Bpd1mJW7j/ccBIaJPJRJCX4Fv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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