Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3b26040abf4a99f31c3a918074acb12613e3a1355d4e6f6fecda49c59e6b898' 
  AND token = 'HMA96mUotKqPEhFMHwRe3YbK4Jp+8GPtq9PUh9V7FoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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