Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1cd1858ab686665590ff2d62dd23abebec64dfe5ab18c7c45d9edfef7245a32' 
  AND token = 'QrmnINlXPva84vgESPzaWvNCrF/sReEPqODROlivWgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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