Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abe9035a435230aa11eeeddcbdc48333950abafbce7ce7d9fccf8cdd178ee9fb' 
  AND token = 'fpnaw4gEBLdR7d7RZpKua/VWMaP1PeMOm4497Km8Kxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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