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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d4ff60f234a22e05dc70e4675bf1d102ea47039a289dfb3ca9b677db09b160a' 
  AND token = 'IgAiPLuqSLyGHoX7Pa04+2atH/3SQroE4c18S+cGnL0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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