Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2b5f3df9c7fc640cb0188a1c3774d49c295e266eaa027ee82891502117f5255b' 
  AND token = 'rqN/AMl0M09x+41fg677xIDHx1ntKADufiHX4xp4PnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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