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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72c3f46bfa4166727d3008ea826ad914efee2d87386d10d7d86631f7a9154ee0' 
  AND token = 'WSTopN0mCtA2z500MrPP7to5DyXGzBt1tVj2n46KZkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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