Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9b9b2019a762e73b396fd12b7f086a414a9b6ccbacaa596e2edb27dd0b1f9da' 
  AND token = 'bBXO143kR17wQZFBIiyYxX1JvW78EhujyTgxOR9XPKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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