Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be126b12fa5965f5b70da62a6b8d711556b1254d17927c6b7d08ae692403c4d1' 
  AND token = 'H5Lr5kxySTzOHvrYFW5l7ydMCh7CfeNyB+KwRBH/7KQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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