Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ce4c277b0aa4a1f4fefcaba7c9eb464c7f7ec0167bbaf960857f0f29fb142a8' 
  AND token = 'mO5xz+wm8C3MbUACYtetf++G4qO1LqCz+bKpzmlR+y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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