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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc0c9aa3b9471a962292733c4fa6e99dce0d09250dadce96fc099fe54e8ed758' 
  AND token = '4mAoZTYJQ3H1JeZdc0j8Cz4Qt16yjKJLfss0puwXg/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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