SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a5d81a677be57eb8421083ab367a0f50c0f7c07ca2eb6c1c6854f993940fbe9' 
  AND token = 'RJqDr5PXTHBvHGCOYNNYGZWfM/dtvvx/ElDu4TNz4WY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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