Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4935d37b382ae947b92d69c28ff9a8d8f9fdff0c66e5c3eb9de528ddb7b4ac1c' 
  AND token = 'mIJ2LSrg33PlrANKIdB1S5b1yhzKvEUI2w/2MuPiUIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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