Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '94857743146a867db60e03814aba45636cc6121fc1e4ce8d258b6c2db41333e0' 
  AND token = '/AXWMSYN51kBZDHYSdhvnjOFySXF50GsVMJe5Gb28Hs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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