Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '651a1ee32e63c7c946e0085374c3077dfa16405daf97dbab23831e1e95383ef2' 
  AND token = 'w/ZdmNp2FbeE5VfCGAuxSjmaRfHfsoWlqIQQt8HfAzY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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