Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'd2b5c88cd7442177ecb1403eeaa57fb72fbd0d8755e91b1f4fc4ae10826964e3' 
  AND token = 'C+B2YUaW5Aqt/T+E9HwbGffy4SNZJzI5kcMul7nQyeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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