Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f78e5e0f2243f770edb635cb33936b82bdb707a439182b126a8dcf027c6226cf' 
  AND token = 'JaH19Y8DB/IxZkL7CUMrlj2133BW5aOlTj/ZApSUpN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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