Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f523132cd0765c4516006a6d34025477f6a4a742d3ed756ebe95e6c6148c2ef9' 
  AND token = 'dVS5hbck3ZxCDKQmy5mvwVi+C00j0A2LpOWzgbWe2YI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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