Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bc2147b5a7ecb448010bfe005771544fd0299b8328787536be01415c25f30c7' 
  AND token = 'N2JGYgVcJ55RrhzLRezjzkqLnDdJmUWh7HHRhGsVtCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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