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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e2a10a0949b677ea2e1ff28fcbe3f2dcb63cef8dd97347df637b47ebbeac93c' 
  AND token = 'DF7yG32FHRt9n/LuEL+km+iC+MzeCUd4L5BhWTU7aQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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