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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b85c97a93ac6139a6b62910c71f3b13b85e5c78726b8283a4c9a119e74500c70' 
  AND token = 'Hu7b8D1a3aqBb768tAScIZ8G96YE8xxL//XLXrXnbiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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