Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '264c7fe940f4380b0383a05d64bb26d13decb71505bc12f2633dfe111719057c' 
  AND token = 'G9gOf5r27xk+3EI/shAEB6UVLuHWET6gBxE1TYdzZ74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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