Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0525439d774622bfa9aca75a2320485d0872b05307b0196dc4d12593869bb7bc' 
  AND token = 'lQCg/XeogkhF4P1dJ5LI3k7wb44mkGddWFS5XPzXdOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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