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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d0b4ed5785e4a56de9826ca75fe117004ba0bf86d72778cc04748cfb4eebd80' 
  AND token = 'SvHYse3mvf3L4rKimpAgvFhNRshG20BimHH5jqgERBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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