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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '592c4ea4cfba3453f5a7f523fbb02cc6edf265ada8c8ed1589b24f1c5d51cc55' 
  AND token = 'eRu9524gX7Q+Z+e7L0roLHeddH56Dm9g8Z893RgfqS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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