Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfdfb018f40e8b6f69e8c0fc1a094257c6565de7ac45723744edb20474692087' 
  AND token = 'a1rPbH/2pI8dEfi8On58oirx1eTKm3cw3HSavYENzQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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