Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '851eb3116852ad8ff4ec237c7e188c77f394c660ecedc18f15149054a77e867f' 
  AND token = 'rk8cZOdjjux96VMDDMbbhH3Q0Frr5rhY4sdt4ULmgHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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