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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4376f0f00c191af1873ce5492d5a588bc7622c4a59e17f86df73f7ffadd7f480' 
  AND token = 'm2l05YyEw0yvh5JU47h50XI4U8eYsEy1V2sIYNafVak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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