Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '838e6d524d36adf8824bbca20cc184f1f15ad539541b575baf75a50b657bb43a' 
  AND token = 'LCzVEbObCkx2EP/Ix5vF0OXwkTybDvckwxIoEn9ELXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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