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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ee57e5b4dc32e5d1fd0fafd7d296052ca08559560f8c2dcbe8ccc85f2f047ce' 
  AND token = 'XZJb9aZofH5U8O/qnawHsqEQbUmjyIO4rCc1K7xdmKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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