SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '80192e958bc2933f2073dd62b0fe60513b489a15fe98b979fcafe21e024c2b90' 
  AND token = 'ZSWYl5zcVaHsWJsY+JAGNev1+qJjCCecoh4FQPJpDcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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