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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60d5b106155635e3ba5e3e5226c696c5bc4e4c3c9252ac2af85c972c4fcf9d95' 
  AND token = 'dp6AkeAnJUHQRPJSymjplvQTQL1Vxj5JXizBfmoCH1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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