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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8829d697ab6564a32e6445b920b876c169dfc86ba81ec995619d82bfdfc24999' 
  AND token = 'Vj+eIF8yd+0HGrocdkQXn35FicQDKA+1CX609WBsXe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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