Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66c576da5796a02d1aa8afbf8627c46756fb041d1482db0c998c208c7db5fdb2' 
  AND token = '2Nc4xoc2OZv9Rw5mMEeEOAFS/ELM7Dd4qpPEByHFmps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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