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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '679f72b95306c3aa2c3e46734566a2bc192d0503966fdc03f6c8e750679d95ee' 
  AND token = 'Tyaksr2TnQbWTrmQ3CXsDBAGBXqgD8NAm+TiVO+vdbI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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