Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c9e5521a0bc993fc68f1024c7165302fb5ceba78c6874078c1822cbfc25fe16' 
  AND token = '8+t0KfL8Z9vLw7ELAGCeEWDXan+ofEfE19BHY48Mfhs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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