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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '118f3258de46f7cc41d8c6a820aa02e54bddbce4a6815b88e359f9d996053b9b' 
  AND token = '7GaKuyrdHpsAyFdw4WJX5IYch8ohD6LS2KigA8ZdIag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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