SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf144c18f51d0b8034767806e37bf407c5103b19b8ea1d86b269cda476302af5' 
  AND token = 'wmWzh4+JuhtS6pEV1GCwZHhPyUJO/WV0aP3z+TJMhsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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