SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '613de995aedb19bb5221bab918d9466dcc3b41f6be0370d6933ef8f02d1c4c72' 
  AND token = 'b0J7Iz4tYljNFRXq6Bjs67ROPc2bvEw8KCHZEbFzZDQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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