Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '955452de88a60f1c4b4ee27edb00c3c2c7ffc0cea49fffbf27c96b33d37bf4b5' 
  AND token = 'nk/a/HwoZyy7mTLpc8jUeWw+uYySfw7dzXSRkecKgwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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