Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83617cd91db186fc3bf5b0e7ae8616a1501db295a0cb938a93369db233a59274' 
  AND token = 'E2hF4QhgEQJ62cQ/ySlKfK9lVLpUw+2XcH/5thQ0b7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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