Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '715c91ceaf20e03184cd611eeca2ce5aece3f7e906265ac6474927d1f475a237' 
  AND token = 'ygFIT9GVREyEK3dsMCPRVBIoa8+R11mG6NKEEH2bKz0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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