SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05a3676eaf69d1345625a7cf3a3f8ba6f65f8820e8c78c601ffcc4d57434a2e8' 
  AND token = 'hj6Wqx8DibxoKCKplvAbwdgqWk9VYqGE9Stwo1Mb+FA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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