Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b945a108f16861012e381e504ea3884078b248ca08eb2e1a34eac74900ef5f4' 
  AND token = 'Q/x5zvY+6JsiNqMvVI9YyvclmRhzhKCPltYe5SS2d9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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