Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c4c7319b86574914015849e45c5f9903aad235016767790dcfcdf0e4da26fc74' 
  AND token = 'GyOFRGRnPB0P+uiiICWmaTqkpeqjItRLt3zVnOV9Ifo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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