Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27f9ac8b3874d17bf81b0c2050fd2667cc15d106b5e9917541dc3fe38919eee1' 
  AND token = 'rsa9MY9F9nfcBjhIKLN7GafbSdf8XX1ZChxs23+17S0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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