Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb79046f686314c5d8546b9a1aef57f02ee3cb249c31bc59de7ad8d0a93105f7' 
  AND token = 'MgPOlD91LejvCytLMh9y9Z8n7+wW+XaeUdNtAzzMGB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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