Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c793772c4f4c53625ecf2fb927450fb2783a4668235adfa7d96562fd56f0ec00' 
  AND token = '3SHFt5sfvLPvpCfKr7HF/WVVmcHD1TcSTQ1CMcCO8Ho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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