SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1675100d8180e7d6102d8fda7f5b8da27050393a1e91a4fa882f7eb27856c965' 
  AND token = 'g/JJJjgGW8l2pskHr/n6z/HbMIRZd79cddR+t/Fbivw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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