Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dff5644b59e18ab735324992c95fa494de29508e6347cd7469f8b8110925b7cf' 
  AND token = 'Uz64KVskQHyXZcfL3jvQx6j1cMMvdfy0/Ms0b7pbpMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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