Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6832ae7263ecda8d423caf1f6212ee104f29425c3c4c409c02590f5bea8fc02c' 
  AND token = 'j/DM5KZXXwOVaHCtJ0a1ajeD3nD2fWqFAb7Yub0NRig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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