Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2eaea015e9628f1189b1979b7ac3413285f81a4b3b785a90dba7530f372577f5' 
  AND token = 'unScLiBbLebXf++d5myipp4WrWpB4F6fPgQrJm6HSWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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