Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29cf73c9b5c759652c6c69dd7459cc7db975907658f3e4e0a6715f7406dfa5a9' 
  AND token = 'es3KYPiKF+NVDyptC/a6maOSO/bfXazxPUNyB5E/o0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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