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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05d4e041494e1641c5a56d2cf789ac4ce434839f835f7fa572b15789e99b06fb' 
  AND token = 'kme5G0hIa83C7UwHae582jb051twqlsTFf3a52+c120=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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