SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '363a21d7c93157a08d0cd65dbc288f43034de8bfa318bc6a7972f0af84e69c44' 
  AND token = 'VtiCWhJoFyeguC0l5OL04McDXjGGp6mZHAsa8zZRvO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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