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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b62c821f383c6dd298248f65ef4fab5253601c0e13e18ed2b5a18e23f8fd93b' 
  AND token = 'wVkEZryf3jLAX/0jzrF5rqYeeT00WBFyKdCZBoaon6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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